English verb conjugation COULD OVERSTAY

Regular verb: overstay - overstayed - overstayed

Affirmation

Simple form

I could overstay
you could overstay
he could overstay
we could overstay
you could overstay
they could overstay

V-ing form

I could be overstaying
you could be overstaying
he could be overstaying
we could be overstaying
you could be overstaying
they could be overstaying

Perfect

I could have overstayed
you could have overstayed
he could have overstayed
we could have overstayed
you could have overstayed
they could have overstayed

V-ing perfect

I could have been overstaying
you could have been overstaying
he could have been overstaying
we could have been overstaying
you could have been overstaying
they could have been overstaying

Negation

Simple form

I couldn't overstay
you couldn't overstay
he couldn't overstay
we couldn't overstay
you couldn't overstay
they couldn't overstay

V-ing form

I couldn't be overstaying
you couldn't be overstaying
he couldn't be overstaying
we couldn't be overstaying
you couldn't be overstaying
they couldn't be overstaying

Perfect

I couldn't have overstayed
you couldn't have overstayed
he couldn't have overstayed
we couldn't have overstayed
you couldn't have overstayed
they couldn't have overstayed

V-ing perfect

I couldn't have been overstaying
you couldn't have been overstaying
he couldn't have been overstaying
we couldn't have been overstaying
you couldn't have been overstaying
they couldn't have been overstaying

Interrogative form

Simple form

could I overstay?
could you overstay?
could he overstay?
could we overstay?
could you overstay?
could they overstay?

V-ing form

could I be overstaying?
could you be overstaying?
could he be overstaying?
could we be overstaying?
could you be overstaying?
could they be overstaying?

Perfect

could I have overstayed?
could you have overstayed?
could he have overstayed?
could we have overstayed?
could you have overstayed?
could they have overstayed?

V-ing perfect

could I have been overstaying?
could you have been overstaying?
could he have been overstaying?
could we have been overstaying?
could you have been overstaying?
could they have been overstaying?

Interro-negative form

Simple form

couldn't I overstay?
couldn't you overstay?
couldn't he overstay?
couldn't we overstay?
couldn't you overstay?
couldn't they overstay?

V-ing form

couldn't I be overstaying?
couldn't you be overstaying?
couldn't he be overstaying?
couldn't we be overstaying?
couldn't you be overstaying?
couldn't they be overstaying?

Perfect

couldn't I have overstayed?
couldn't you have overstayed?
couldn't he have overstayed?
couldn't we have overstayed?
couldn't you have overstayed?
couldn't they have overstayed?

V-ing perfect

couldn't I have been overstaying?
couldn't you have been overstaying?
couldn't he have been overstaying?
couldn't we have been overstaying?
couldn't you have been overstaying?
couldn't they have been overstaying?

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